Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh suat » trinh luat, trinh sat, trinh quan
thong danh » thong dan, thong lanh, trong danh
soc thiet » hoc thiet, so thiet, toc thieu
hoa thiet » hoc thiet, toan thiet, hoa viet
thong anh » thong lanh, hong anh, trong anh
tuan cau » toan cau, quan cau, tuan cu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((soc thiet) OR (hoa thiet)) tach - hanh trinh suat thong ((thong anh) OR (thong danh)) tuan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((soc thiet) or (hoa thiet)) tach - hanh trinh suat thong ((thong anh) OR (thong danh)) tuan cau~".
• Adding a wildcard symbol may retrieve word variants: ((soc thiet) or (hoa thiet)) tach - hanh trinh suat thong ((thong anh) OR (thong danh)) tuan cau*.